[Roadmonster]

I've heard figures between 10 and 20% less fuel economy. I'm burning E85 in my new GMC truck and wanted to ask if any RM drivers have experimented with E10 or E85 on the LT1 to get some real world feedback. I saw an interesting video on youtube today about a non-flexfuel vehicle that had burned E85 for 105,000 miles with no ill-affects. The engine was torn down and showed no abnormal wear. Other sites say that the alcohol will react with rubber, aluminum, and magnesium in the fuel system. Two distinct camps on the subject.